The watch-like shape of the previous-generation iPod nano inspired a cottage wristband industry of its own, turning the music player -- which also had a clock-face app and a few limited other uses -- into a form of "smart watch" that caught the fancy of millions. With advancements since 2010 in connectivity, Bluetooth and miniaturization, Apple could -- according to former Apple Human Interface Group founder Bruce "Tog" Tognazzini -- create its own smartwatch that could do even more.